Gold (III) porphyrin was used as an electron acceptor for efficient organic solar cells

V Cuesta, MK Singh… - … applied materials & …, 2022 - ACS Publications
ACS applied materials & interfaces, 2022ACS Publications
The widespread use of nonfullerene-based electron-accepting materials has triggered a
rapid increase in the performance of organic photovoltaic devices. However, the number of
efficient acceptor compounds available is rather limited, which hinders the discovery of new,
high-performing donor: acceptor combinations. Here, we present a new, efficient electron-
accepting compound based on a hitherto unexplored family of well-known molecules: gold
porphyrins. The electronic properties of our electron-accepting gold porphyrin, named VC10 …
The widespread use of nonfullerene-based electron-accepting materials has triggered a rapid increase in the performance of organic photovoltaic devices. However, the number of efficient acceptor compounds available is rather limited, which hinders the discovery of new, high-performing donor:acceptor combinations. Here, we present a new, efficient electron-accepting compound based on a hitherto unexplored family of well-known molecules: gold porphyrins. The electronic properties of our electron-accepting gold porphyrin, named VC10, were studied by UV–Vis spectroscopy and by cyclic voltammetry (CV) , revealing two intense optical absorption bands at 500–600 and 700–920 nm and an optical bandgap of 1.39 eV. Blending VC10 with PTB7-Th, a donor polymer, which gives rise to an absorption band at 550–780 nm complementary to that of VC10, enables the fabrication of organic solar cells (OSCs) featuring a power conversion efficiency of 9.24% and an energy loss of 0.52 eV. Hence, this work establishes a new approach in the search for efficient acceptor molecules for solar cells and new guidelines for future photovoltaic material design.
ACS Publications
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